Replacement Power Supply for Colour Touch 5080-CTC1, CTC2 and CTC3

Discussion in 'General Discussion' started by Trevor, Jul 23, 2019.

  1. Trevor

    Trevor

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    Hi All,
    I would like to know if their is any interest in the availability of replacement power supply units for the colour touch screens.
    If there is sufficient interest we will be in a position to provide these units for each of the 3 different unit types, fitted with the appropriate DC power connector.

    We are already providing a repair service for these units and would like to also be in a position to provide the power supplies as well, but need to show our management that there is interest in them as we would need to purchase a minimum number due to the specific output requirements.

    Best Regards and have a great day,
    Trevor Callaghan

    Senior Workshop Technician
    Arbor Australia Pty Ltd
    Unit 1/72 Bayfield Rd
    Bayswater North
    Victoria 3153 Australia
    Mobile : 0404 887 463
    Phone : +61 3 8736 0328
    Fax : +61 3 8736 0325
    Email : trevorc@arboraust.com
     
    Trevor, Jul 23, 2019
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  2. Trevor

    MartynPigg

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    Used you recentlyTrevor to repair a Colour Touchscreen absolutely brilliant service couldn't recommend you higher
    Thanks Martyn
     
    MartynPigg, Jul 24, 2019
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  3. Trevor

    Trevor

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    Just a quick update, we are currently testing a replacement power supply, that will be suitable for both the CTC1 and CTC2 units. If all goes well, we should have this available from mid to late August for sale.
    We are also looking at getting a replacement for the CTC3 version as well.

    regards
    Trevor
     
    Trevor, Jul 29, 2019
    #3
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  4. Trevor

    Trevor

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    Due to certification requirements the current power supplies we were investigating turned out to not be suitable for the Australian market. I will endeavour to keep looking for a solution as I'm continuously made aware their is a requirement for replacement power supplies.

    Regards
    Trevor Callaghan
    Senior Workshop Technician
    Arbor Australia Pty Ltd
    Unit 1/72 Bayfield Rd
    Bayswater North
    Victoria 3153 Australia
    Mobile : 0404 887 463
    Phone : +61 3 8736 0328
    Fax : +61 3 8736 0325
    Email : trevorc@arboraust.com
     
    Trevor, Aug 12, 2019
    #4
  5. Trevor

    Trevor

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    Hi Again,
    just another update, I'm still looking for appropriate replacement power supplies for the touch screens.
    In the mean time, until I do have a solution we can provide directly from us, here are some possible solutions...

    CTC1 and CTC2 - Jaycar has a Mean Well 70W 5V 14A Power Supply (MP3289). It is an open frame type and for this reason I am unable to offer it directly. It can be adjusted to provide the required output to drive the units, you will need to splice the DC cable from the AC/DC power pack or the DC/DC (small box)

    CTC3 - a generic 24 Volt 10 Amp power supply (off the shelf) will work with these units

    I'll keep looking for a better solution in the mean time.

    regards
    Trevor Callaghan
    Senior Workshop Technician
    Arbor Australia Pty Ltd
    Unit 1/72 Bayfield Rd
    Bayswater North
    Victoria 3153 Australia
    Mobile : 0404 887 463
    Phone : +61 3 8736 0328
    Fax : +61 3 8736 0325
    Email : trevorc@arboraust.com
     
    Trevor, Aug 22, 2019
    #5
  6. Trevor

    ashleigh Moderator

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    Just an FYI. The CTC1 used a 4-wire voltage sensing PS and the output voltage was a bit higher than normally expected to cater for an internal reverse-polarity protection diode (which actually makes a bit of heat). From ROUGH memory so don't trust or quote me, you need about 5.6 to 5.7 V at the input terminals of the CTC1.

    The CTC2 used an external MOSFET based reverse polarity protection arrangement, which has lower losses. I'm fairly sure this still had a 4-wire voltage sensing PS.

    The CTC3... no idea.

    The 4-wire voltage sensing PS is used to ensure that the voltage at the input is what is needed, as the high currents see a voltage drop down the cable, and the cables could be VERY LONG. So just picking something and tweaking it to around 5.6 or so V output (under no load conditions) will not be right. It needs to have the right voltage at the CTC, under load, and with the cable length that is in the installation.

    ** Thats why the PS is/was non-trivial **
     
    ashleigh, Aug 22, 2019
    #6
  7. Trevor

    Trevor

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    Hi Ashleigh,
    Arbor Australia originally designed and built these units for Clipsal. The internal power regulation on all 3 types is based on a buck boost power supply arrangement, this in turn provides the power to drive the internal regulators throughout the unit, and there is a lot of them. The CTC1 power supply is only an output power device it has no feedback regulation, the 4 pins are a double up of positive and negative conductors. The CTC2 uses the small DC-DC regulator box between the AC-DC power pack and the unit, it gets feedback from the CTC2 and keeps the input voltage stable to the unit. It has a 7 pin connector going to the CTC2, 3 pins each for plus and minus and one for the feedback.

    The CTC1 does use a reverse voltage protection diode and drops 0.7v across it when powered up.
    The CTC2 uses the DC-DC converter to do this and is more stable as it provides an output to the unit after the protection CCT.

    You are also correct about the output voltage needing to be correct at the input to the CTC1 and CTC2, this is why Clipsal had the original power packs made to output 5.3 Volts for the CTC1 and 5.6 Volts for the CTC2.
    The CTC3 power supply is a standard 24 Volt DC output with no feedback, it only uses 2 pins.

    The Mean Well power supply will drive these units as I have had several customers bring in their units and get me to adjust them here so they do work correctly. I have also done this over the phone for some end users to set theirs correctly as well.

    I am only a technician, so am limited in knowledge of the reasons behind the design , but the original engineer who did do the design still works for Arbor, if anybody has any questions I can relay them to him and reply here.

    regards
    Trevor Callaghan
    Senior Workshop Technician
    Arbor Australia Pty Ltd
    Unit 1/72 Bayfield Rd
    Bayswater North
    Victoria 3153 Australia
    Mobile : 0404 887 463
    Phone : +61 3 8736 0328
    Fax : +61 3 8736 0325
    Email : trevorc@arboraust.com
     
    Trevor, Aug 22, 2019
    #7
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